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IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences

Irregular Low-Density Parity-Check Code Design Based on Euclidean Geometries

Wataru Matsumoto

Published Jul 1, 2003• 3 citations
OpenAlex

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This paper presents a method to the construction of irregular low-density parity-check (LDPC) codes based on Euclidean geometries over the Galois field. Codes constructed by this method are quasi-cyclic (QC) and have large girths. The proposed irregular LDPC codes having flexible column/row weights are obtained with a hyperplane decomposing method in Euclidean geometries. Therefore, the degree distributions of proposed irregular LDPC codes can be optimized by technologies like the curve fitting approach in the extrinsic information transfer (EXIT) charts. Simulation results show that these codes perform very well with an iterative decoding over the AWGN channel.
This paper presents methods to the construction of regular and irregular low-density parity-check (LDPC) codes based on Euclidean geometries over the Galois field. Codes constructed by these methods have quasi-cyclic (QC) structure and large girth. By decomposing hyperplanes in Euclidean geometry, the proposed irregular LDPC codes have flexible column/row weights. Therefore, the degree distributions of proposed irregular LDPC codes can be optimized by technologies like the curve fitting in the extrinsic information transfer (EXIT) charts. Simulation results show that the proposed codes perform very well with an iterative decoding over the AWGN channel.